I just sent an email, with screenshots, of my problem to the makers of "A Better File Rename" asking them to--as a short term solution--provide me with a single GREP expression that I could paste into the "Advanced/Grep" field, to fix my problem,
Convert all selected files to "Title Case"
THEN insert a space in front of every Capital letter (except for the first letter in each file name)
THEN remove any duplicated spaces.
Hopefully they will reply, otherwise I hope somebody who's a good GREP expert will answer this question. Why the PC version of iTunes does this name-compression routine is a "bug" and Apple isn't talkin'... :-//